The U.S. Army Program Executive Office for Simulation, Training and Instrumentation (PEO STRI), Product Manager for Ground Combat Tactical Trainers (PM GCTT) has a requirement for design, development, integration, test, management, documentation, and delivery of the Stryker MTS Phase IV effort.This effort is to seamlessly expand the capability of the current system by adding a Diagnostic Troubleshooting Trainers capability (DTT) for the STRYKER Mobile Gun System (MGS), develop 111 DTT MGS lessons in a 3D graphics, provide spares, upgrade classroom hardware, and upgrade Windows Operation System to the latest Army approved Unified Golden Master Operating System.Award of a delivery order under (DO) STOC II Lot II is planned for September 2014.The Government anticipates a DO with Firm Fixed Price Contract Line Item Numbers (CLINs) for the aforementioned requirement and a Time & Materials (T&M) CLIN will be utilized to address any unforeseen work that is required to complete the upgrades.